Method for gob-side entry retaining by means of high-water material filling pillars

Abstract

The invention provides a method for gob-side entry retaining by means of high-water material filling pillars. The method comprises operation steps as follows: 1) a high-water material filling area is pre-made between a coal exploitation region and a retained entry, and air inflation templates are arranged on one side, close to the retained entry, of the high-water material filling area; 2) holes are pre-formed in the high-water material filling area and the air inflation templates, and locking bolts penetrate through the holes; 3) a plurality of support pillars are attached to one side, close to the retained entry, of each air inflation template; 4) roof anchor rods are beaten firstly during advancing along the mining working face at the top of the high-water material filling area, the air inflation templates are inflated, then, the high-water material filling area is backfilled, and besides, concrete is added for solidification; 5) after a structure in the high-water material filling area is hardened, the air inflation templates are removed, and fixation through the locking bolts and the support pillars is performed again; 6) with advancing of the mining working face, the step 4) and the step 5) are repeated until construction of the whole retained entry is completed. Construction of the high-water material filling area is greatly facilitated, and popularization is facilitated.

Description

technical field [0001] The invention relates to the field of gob-side entry retention in coal seams, in particular to a method for gob-side entry entry retention of high-water material filling columns. Background technique [0002] With the continuous development of the current social economy, people's living standards are also constantly improving, but while the economy and society are developing, the demand for natural resources is gradually increasing, especially the use of primary energy coal, oil, and natural gas. The developed machinery brings powerful power. However, in the mining process of these primary energy sources, a large number of discrepancies will not only lead to waste of resources, but also cause damage to water resources and land resources in the surrounding mining areas, and will also cause harmful gases deposited in the coal seam Volatile. [0003] In the current process of coal mining, it is often difficult to construct filling areas with high-water ...

AI Technical Summary

Problems solved by technology

However, in the mining process of these primary energy sources, a large number of discrepancies will not only lead to waste of resources, but also cause damage to water resources and land resources in the surrounding mining areas, and will also cause harmful gases deposited in the coal seam volatile

[0003] In the current process of coal mining, it is often difficult to construct filling areas with high-water materials, and the cost is high, so it is not easy to promote in the actual coal mining process

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